It all fell into place at Chicago’s ACE Comic Con, October 11-13, where Larson was appearing. It’s common for fans to take snaps with the actors and when doing so, John Chambrone dropped to one knee to propose to his boyfriend Richard Owens, reports CNN.

Larson was taken aback, in a good way, and shared the moment on Twitter:

She seems even more surprised than the boyfriend being presented with a ring. According to Chambrone’s Facebook update, Larson also helped him put the ring on, with Owens saying… yes!! (Whew, that could have been really awkward.)

The newly engaged couple were so happy that their embrace actually knocked the super star out of the picture. We can still see her excitement peeking through, though.